YAMAHA YZ 490 [1985-1988] - forged pistons

WISECO forged pistons for the YAMAHA YZ 490

The WISECO forged piston is assigned to the YAMAHA YZ 490 in the full year range from 1985 to 1988. As a component from the engine, top engine and piston areas, it offers a clearly defined technical design for selecting the appropriate piston within this vehicle model.

Technical features

• Piston Type: Forged
• Material: aluminum
• Piston compression: standard
• Diameter Ø: 87.50 mm
• Letter oversize: 050
• Oversize: +0.05
• Stroke: 2T

Selection and assignment

The diameter of 87.50 mm and the markings “050” and “+0.05” are available to check whether the design is suitable. The standard piston compression and the design as a forged aluminum piston enable a clear technical classification of the component.

The piston is the YAMAHA YZ 490 and is exclusively assigned to the model year range 1985-1988. Before making a selection, the technical dimensions should be compared with the intended engine variant, in particular diameter, oversize and the information “Stroke: 2T”.

Technical classification

With its forged design, aluminum as the material and standard compression, this WISECO forged piston is set to the technical specifications mentioned. The values given are used for precise selection for the YAMAHA YZ 490 from the years 1985 to 1988.